Door-bolt



E. BRADSHAW.

noon sou. APPLICATION FILED In. 3, I918- RENEWED SEPT. 19. l9I 9-Patented Dec. 9,1919.

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EDWIN iarmnsnaw, or San FRANCISCO, CALIFORNIA.

noon-12cm. I

Specification of Letters Patent.

Patented Dec. 9, 1919.

Application filed January 3, 1e1s,- serieino. 210,128. Renewed September19, me. Serial No. 325,036.

citizen of the United States, and a resident .of San Francisco, in thecounty of San Francisco and State otCaliiornia, have invented certainnew and useful Improvements in Door-Bolts, of whichthe following is aspecification.

.My invention is an improvement in door bolts, and has for its object toprovide a device of the character specified for positively locking thedoor from the inside, in such manner that it cannot be opened from theoutside by boring or cutting the door, which is normally spring-held inoperative position and which may be locked inoperative position. p

In the drawings: y 2

Figure 1 is a perspective view of a portion of a door casement, showingthe bolt in place;

Fig. 2 is a section on the line 2-2 of Fig. 1, with the parts in oneposition;

Fig. 3 is a similar view with the parts in another position;

Fig. 4: is a section on the line 44 of Fig. 3;

Fig. 5 is a perspective view of another embodiment of the invention.

The embodiment of the invention shown in Figs. 1 to 4 is shown inconnection with a door casing 1, the said casing having the usual grooveor'rabbet 2 for receiving the edge of the door 3. The latch plate 5 ofthe door, which is provided with the usual openings 6 and 7 for thelatch and lock bolts, respectively, is secured within a mortise in thegroove by the usual screws 8, and this plate has a pair of spacedextensions 9 in the plane of the plate and extending outwardly 7 beyondthe casement as shown, each extension having a bearing 10 at its freeend.

Between the extensions is a housing 11, the said housing being behindthe space between the extensions and being supported by the extensions.The bolt proper is, when in operative position, housed in this housing,and the said bolt consists of a plate 12 having an angular portion 13 atone end, the plate being pivoted at the opposite end to a pintle pin14;, which is passed through the bearings 10 of the extensions andthrough a bearing on the plate 12.

The angular portion 13 of the plate is at substantially a right angle tothe plate, and when the p ate is in the ho s g it out .and at the otheragainst the plate.

I face is flush with the outer faces of the extensions 9. A spring 15normally presses the plate 12 outward into the position of Fig. 8, thesaid spring encircling the pintle and hearing at one end against thehousing The pin tie is normally pressed upwardly by a coil parallel withthe body of the pintle and in spaced relation, andthis portion 17 isslidable in an opening in the lower side of the housing 11.

The plate 12 has inwardly extending lug 18 which has an opening forreceiving the extension '17 to hold the bolt 1213 in the housing, andwhen the plate is pushed pintle upwardly and will cause the extension 17to engage the opening of the lug 18.

In Fig. 5 the device is shown separate from the plate 5. In thisconstruction a plate 19 is provided, having the extensions 20corresponding to the extensions 9 of Fig. 1. The locking plate 21, whichcorresponds in all respects to that 1213 of Fig. 1, is normally pressedoutwardly by the spring 2 1, and the operation is precisely the same asin the construction of Fig. 1, the only difierence between the twoembodiments being that that shown in Fig. 5 is independent of the latchplate. This plate 19 has openings 25 for receiving screws or the liketo.

connect it to the door casement. The construction shown in Fig. 5 may beattached to any door and in any position.

In operation, in either construction, the

parts may occupy the position shown in Fig.

9f the portion 13. When out in the position of Fig.- 3 it provides apositive 1 k for pre venting the opening of the door until the bolt 12is released by pushing the same into the housing. Access is notpermitted to the bolt by any key-hole or other opening, and it must beoperated from the inside.

It will b noticed that the improved" bolt be used with sashes andtransoms as well as With doors.

I claim:

1. A device of the character specified, comprising a plate having meansfor connecting the same to a door casement at the free edge of the door,said plate having upper and lower bearing extensions extending beyondthe plane of the door when closed, a locking bolt between theextensions, said locking bolt having a bearing registering with thebearings of the extension, a pintle pin passing through the registeringbearings and movable vertically with respect thereto, a spring normallypressing the pintle pin upward, said pintle pin having at its lower enda lateral offset portion extending alongside the body of the pin inparallel spaced relation, the locking bolt having an inwardly extendinglug provided with an opening for receiving the extension of the pin tolock the bolt in inoperative position, and a spring normally pressingthe locking bolt into the path of movement of the door opening.

2. A device of the character specified, comprising a plate having meansfor connecting the same to a door casing and having its outer endnotched and provided with a housing on one face, a bolt, a pintle pinhinging the bolt to the plate and movable longitudinally in the plateand bolt, a spring normally pressing the bolt out of the housing, andmeans in connection with the pintle pin and the bolt for locking thesame within the housing.

3. A device of the character specified, comprising a housing havingmeans for connecting the same to a door casing, a bolt in the housing, apintle pin connecting the bolt to the housing and movablelongitudinally, a spring normally pressing the bolt out of the housing,and means in connection with the. pintle pin and the bolt and controlledby the longitudinal movement of the pin for locking the boltin thehousing.

EDWIN BRADSHAW.

Witnesses C. D. SATFIEIJ), H. G. HINDs.

